<template>
    <div>
        <el-tree :data="menus"
                 :props="menusProps"
                 show-checkbox
                 node-key="catId"
                 :default-expanded-keys="expandedKey"
                 :expand-on-click-node="false"
                 @node-click="handleNodeClick">
            <span class="custom-tree-node" slot-scope="{ node, data }">
                <span>{{ node.label }}</span>
                <span>
                  <el-button v-if="node.level <= 2" type="text" size="mini" @click="append(data)">添加</el-button>
                  <el-button type="text" size="mini" @click="edit(data)">编辑</el-button>
                  <el-button v-if="node.childNodes.length === 0" type="text" size="mini"
                             @click="remove(node, data)">删除</el-button>
                </span>
            </span>
        </el-tree>

        <el-dialog
            :title="title"
            :before-close="closeDialog"
            :visible.sync="dialogVisible"
            width="30%">
            <el-form :model="category">
                <el-form-item label="分类名称">
                    <el-input v-model="category.name" autocomplete="off"></el-input>
                </el-form-item>
                <el-form-item label="图标">
                    <el-input v-model="category.icon" autocomplete="off"></el-input>
                </el-form-item>
                <el-form-item label="计量单位">
                    <el-input v-model="category.productUnit" autocomplete="off"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="dialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="submitData">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
// 这里可以导入其他文件（比如：组件，工具 js，第三方插件 js，json 文件，图片文件等等）
// 例如：import  《组件名称》  from '《组件路径》 ';
export default {
    // import 引入的组件需要注入到对象中才能使用
    components: {},
    props: {},
    data() {
        // 这里存放数据
        return {
            title: "",
            dialogType: "", //edit  add
            category: {
                name: "",
                parentCid: 0,
                catLevel: 0,
                showStatus: 1,
                sort: 0,
                productUnit: "",
                icon: "",
                catId: null
            },
            dialogVisible: false,
            expandedKey: [],
            menus: [],
            menusProps: {
                children: 'children',
                label: 'name'
            }
        }
    },
    // 计算属性 类似于 data 概念
    computed: {},
    // 监控 data 中的数据变化
    watch: {},
    // 方法集合
    methods: {
        cancel() {
            this.closeDialog()
        },
        //初始化默认值
        closeDialog() {
            this.dialogVisible = false;
            this.category = {};
            console.log("dialog被调用了。。。。。")
        },
        //提交表单
        submitData() {
            if (this.dialogType === "add") {
                this.addCategory();
            }
            if (this.dialogType === "edit") {
                this.editCategory();
            }
        },
        //修改三级分类数据
        editCategory() {
            let {catId, name, icon, productUnit} = this.category;
            this.$http({
                url: this.$http.adornUrl('/product/category/update'),
                method: 'post',
                data: this.$http.adornData({catId, name, icon, productUnit}, false)
            }).then(({data}) => {
                this.$message.success("修改成功")
                //刷新出新的菜单
                this.getMenu();
                //设置需要默认展开的菜单
                console.log(data)
                console.log(this.category)
                this.expandedKey = [this.category.parentCid]
                this.dialogVisible = false;
            })
        },
        //编辑
        edit(data) {
            this.dialogVisible = true;
            this.dialogType = "edit";
            this.title = "编辑分类";
            //发送请求获取当前节点最新的数据
            this.$http({
                url: this.$http.adornUrl(`/product/category/info/${data.catId}`),
                method: 'get'
            }).then(({data}) => {
                console.log("要回显的数据", data)
                this.category.name = data.data.name;
                this.category.catId = data.data.catId;
                this.category.icon = data.data.icon;
                this.category.parentCid = data.data.parentCid;
                this.category.productUnit = data.data.productUnit;
                this.category.catLevel = data.data.catLevel;
                this.category.sort = data.data.sort;
                this.category.showStatus = data.data.showStatus;
            })
        },
        //新增节点
        append(data) {
            console.log("append", data);
            this.dialogType = "add";
            this.title = "添加分类";
            this.dialogVisible = true;
            this.category.parentCid = data.catId;
            this.category.catLevel = data.catLevel * 1 + 1;
            this.category.catId = null;
            this.category.name = "";
            this.category.icon = "";
            this.category.productUnit = "";
            this.category.sort = 0;
            this.category.showStatus = 1;
        },
        addCategory() {
            console.log("提交的三级分类数据", this.category);
            this.$http({
                url: this.$http.adornUrl('/product/category/save'),
                method: 'post',
                data: this.$http.adornData(this.category, false)
            }).then(({data}) => {
                this.$message.success("保存成功")
                //关闭对话框
                this.dialogVisible = false;
                //刷新出新的菜单
                this.getMenu();
                //设置需要默认展开的菜单
                this.expandedKey = [this.category.parentCid]
            })
        },
        //节点被点击时的回调
        handleNodeClick(data) {
            console.log(data);
        },
        //获取多级菜单
        getMenu() {
            this.$http({
                url: this.$http.adornUrl('/product/category/list/tree'),
                method: 'get'
            }).then(({data}) => {
                this.menus = data.data;
            })
        },
        //删除节点
        remove(node, data) {
            let ids = [data.catId];
            this.$confirm(`是否删除「${data.name}」菜单`, '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {
                this.$http({
                    url: this.$http.adornUrl('/product/category/delete'),
                    method: 'post',
                    data: this.$http.adornData(ids, false)
                }).then(({data}) => {
                    this.$message.success("删除成功")
                    this.getMenu();
                    console.log("category", this.category)
                    this.expandedKey = [node.parent.data.catId]
                })
            }).catch(() => {
                this.$message.info("已取消删除");
            });
        }
    },
    // 生命周期 - 创建完成（可以访问当前this 实例）
    created() {
        this.getMenu();
    },
    // 生命周期 - 挂载完成（可以访问 DOM 元素）
    mounted() {
    },
    beforeCreate() {
    },
    beforeMount() {
    }, // 生命周期 - 挂载之前
    beforeUpdate() {
    }, // 生命周期 - 更新之前
    updated() {
    }, // 生命周期 - 更新之后
    beforeDestroy() {
    }, // 生命周期 - 销毁之前
    destroyed() {
    }, // 生命周期 - 销毁完成
    activated() {
    } // 如果页面有 keep-alive 缓存功能,这个函数会触发
}
</script>

<style scoped>
</style>
